package com.sky.service.impl;

import com.github.pagehelper.Constant;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.annotation.AutoFill;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.enumeration.OperationType;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {
    @Autowired
    CategoryMapper categoryMapper;
    @Autowired
    DishMapper dishMapper;
    @Autowired
    SetmealMapper setmealMapper;

    /**
     * 新增菜品分类
     * @param categoryDTO
     */
    @Override
    public void save(CategoryDTO categoryDTO) {
        Category category=new Category();
        BeanUtils.copyProperties(categoryDTO,category);
        category.setStatus(StatusConstant.ENABLE);
        categoryMapper.insert(category);
    }

    /**
     * 分页查询菜品分类
     * @param categoryPageQueryDTO
     * @return
     */
    @Override
    public PageResult findAll(CategoryPageQueryDTO categoryPageQueryDTO) {
        PageHelper.startPage(categoryPageQueryDTO.getPage(),categoryPageQueryDTO.getPageSize());
        Page<Category> category =categoryMapper.findAll(categoryPageQueryDTO);
        return new PageResult (category.getTotal(),category.getResult());
    }

    /**
     * 启用或禁用菜品分类
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Category category=Category.builder()
                .status(status)
                .id(id)
                .build();

        categoryMapper.update(category);
    }

    /**
     * 根据id删除菜品分类
     * @param id
     */
    @Override
    public void delete(Long id) {
        Integer count = dishMapper.countByCategoryID(id);
        if(count>0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }
        count=setmealMapper.countByCategoryID(id);
        if(count>0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        categoryMapper.delete(id);
    }

    /**
     * 更新菜品信息
     * @param categoryDTO
     */
    @Override
    public void update(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO,category);
        category.setUpdateTime(LocalDateTime.now());
        category.setUpdateUser(BaseContext.getCurrentId());
        categoryMapper.update(category);
    }

    /**
     * 根据分类查看菜品信息
     * @param type
     * @return
     */
    @Override
    public List<Category> list(Integer type) {
        return categoryMapper.list(type);
    }
}
